diff options
Diffstat (limited to '3754/CH20/EX20.13')
| -rw-r--r-- | 3754/CH20/EX20.13/20_13.sce | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/3754/CH20/EX20.13/20_13.sce b/3754/CH20/EX20.13/20_13.sce new file mode 100644 index 000000000..59504e9a4 --- /dev/null +++ b/3754/CH20/EX20.13/20_13.sce @@ -0,0 +1,23 @@ +clear//
+
+//Variables
+
+VO=5.0;VL=5.0;
+IL = 20.0 //Load current (in milli-Ampere)
+PZmax = 500.0 //Maximum power dissipation in zener (in milli-watt)
+VSmin = 9.0 //Minimum source voltage (in volts)
+VSmax = 15.0 //Maximum source voltage (in volts)
+VZ = 5
+IZ =20
+//Calculation
+
+IZmax = PZmax / VZ //Maximum zener current (in milli-Ampere)
+ISmax = IL + IZ //Maximum input current (in milli-Ampere)
+RSmin = (VSmax - VZ)/(IZmax + IL) //Minimum value of regulating resistance (in kilo-ohm)
+IZ = (VSmin - VZ)/ RSmin - IL //Minimum value of zener current
+
+//Result
+
+printf("\n Input varies from the normal 12 v within the range of +- 3 V.")
+printf("\n Zener current vary from %0.3f mA to %0.3f mA.",IZ,IZmax)
+printf("\n For safety purpose RS should be 220 ohm.")
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